How Much Does an Alberta Spruce Grow in a Year?

Slow Growth

• According to the Arbor Day Foundation, a slow-growing tree is one that grows less than 12 inches per year. Alberta spruce trees fit this definition, and they can take 25 to 30 years to reach a mature height of 6 to 8 feet tall with a 4- to 5-foot spread. Some trees do grow larger than 8 feet, reaching 10 to 12 feet or more; however they can take up to 50 years to reach such heights. However, a tree's growth rate depends on water, soil, drainage and amount of sunlight.

Light and Soil Requirements

• Dwarf Alberta spruces require a location with full sun for optimal growth, but trees do tolerate part shade. While trees thrive in moist loam, they also grow well in clay or sandy soils. Trees need an area away from other plants and structures to allow sunlight and air to keep foliage dry. Dwarf Alberta spruce requires regular watering, as often as weekly, but more often during hot, dry weather.

Care

• Dwarf Alberta spruce are low-maintenance trees. Feed trees with an all-purpose fertilizer in spring to enhance growth. Using a watering can, mix 1 tablespoon of fertilizer for every gallon of water and water the plant. The trees require light pruning to maintain their conical shape; however, you can prune them in topiary designs. The trees tolerate cold weather, heat and short periods of drought. They are not tolerant of pollution, consistently dry soil, winter salt spray and other urban stresses. Some trees may revert to the species form, white spruce (Picea glauca). If this occurs, the tree grows a vigorous shoot, which is unlike the usual slow growth. If you notice a vigorously growing shoot, remove it immediately.

Problems

• Pests and disease of dwarf Alberta spruce can affect its growth, so watching for insect infestations and controlling them is necessary to avoid injury to the tree. Some common pests of Alberta spruce include mites, which cause needle and stem death on infected tree parts. To help reduce the mite risk, place trees in an area where they receive good air circulation, because trees are most susceptible when wet in spring and summer.